Question

Arrange in the increasing order (lowest first) for the values of $e/m$ (charge/mass)

• A. $e < p < n < \alpha$
• B. $n < p < e < \alpha$
• C. $n < p < \alpha < e$
• D. $n < \alpha < p < e$

Answer 1

Answer: (D)

$n < \alpha < p < e$

Answer 2

$\frac{e}{m}$ for $\left(\right.i\left.\right)$ neutron $=\frac{0}{1}=0$ $\left(\right.ii\left.\right)$ $\alpha -$ particle $=\frac{2}{4}=0.5$ $\left(\right.iii\left.\right)$ Proton $=\frac{1}{1}=1$ $\left(\right.iv\left.\right)$ electron $=\frac{1}{1 / 1837}=1837$ .